From: Wenli Looi <wlooi@ucalgary.ca>
Date: Sun, 20 Jun 2021 23:32:28 -0700
Subject: [PATCH] ath79: add support for booting QCN550x

Based on wikidevi, QCN550x is a "Dragonfly" like QCA9561 and QCA9563.
Treating it as QCA956x seems to work.
Tested on Netgear EX7300v2 which boots successfully with
the same CPU clock as the stock firmware.

Link: https://wikidevi.wi-cat.ru/Qualcomm#bgn
Link: https://wikidevi.wi-cat.ru/Qualcomm_Atheros#.28a.29bgn_2
Signed-off-by: Wenli Looi <wlooi@ucalgary.ca>

--- a/arch/mips/ath79/early_printk.c
+++ b/arch/mips/ath79/early_printk.c
@@ -121,6 +121,7 @@ static void prom_putchar_init(void)
 	case REV_ID_MAJOR_QCA9558:
 	case REV_ID_MAJOR_TP9343:
 	case REV_ID_MAJOR_QCA956X:
+	case REV_ID_MAJOR_QCN550X:
 		_prom_putchar = prom_putchar_ar71xx;
 		break;
 
--- a/arch/mips/ath79/setup.c
+++ b/arch/mips/ath79/setup.c
@@ -168,6 +168,12 @@ static void __init ath79_detect_sys_type
 		rev = id & QCA956X_REV_ID_REVISION_MASK;
 		break;
 
+	case REV_ID_MAJOR_QCN550X:
+		ath79_soc = ATH79_SOC_QCA956X;
+		chip = "550X";
+		rev = id & QCA956X_REV_ID_REVISION_MASK;
+		break;
+
 	case REV_ID_MAJOR_TP9343:
 		ath79_soc = ATH79_SOC_TP9343;
 		chip = "9343";
--- a/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
+++ b/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
@@ -862,6 +862,7 @@
 #define REV_ID_MAJOR_QCA9558		0x1130
 #define REV_ID_MAJOR_TP9343		0x0150
 #define REV_ID_MAJOR_QCA956X		0x1150
+#define REV_ID_MAJOR_QCN550X		0x2170
 
 #define AR71XX_REV_ID_MINOR_MASK	0x3
 #define AR71XX_REV_ID_MINOR_AR7130	0x0
